What is the reason for alumina ceramics turning yellowish?

July 27, 2023

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What is the reason for alumina ceramics turning yellowish?

We are familiar with most of the alumina ceramic products are white, but alumina ceramics in place for a long time or use for a long time will be found to become a yellowish, that is what causes it? The following is the professional production of alumina ceramics manufacturers to focus on what causes alumina ceramics into yellowish.


White alumina ceramics will gradually become yellowish, on the one hand, because after sunlight exposure, its internal composition changes, and this change is irreversible, so the color will change.


On the other hand, it is possible that the alumina ceramic moisture decomposition, thus producing a hydrated alumina. In fact, not only ceramic products have this characteristic, other materials will also have, so we can only overcome the phenomenon of alumina ceramic discoloration by minimizing the influence of external factors.


About alumina ceramics, in addition to the reasons behind its discoloration to figure out, but also to master it to make some basic principles of the core, to ensure that the product made to meet the requirements of the normal use of.


Considering the special material, we should be more careful when designing the alumina ceramic cores to reduce unnecessary damage. Mainly involved in the content of the installation parts type, size and its location, the way the parts are fixed, the nature of the load, direction, size and distribution; alumina ceramic bearing type and size; alumina ceramic shaft blank, manufacturing and assembly process, installation and transportation; deformation of the shaft and a series of factors.


In a word, must be designed according to the specific requirements of alumina ceramic shaft, but to save materials, reduce weight as the premise, try to use equal strength profile size or large cross-sectional coefficient of the cross-sectional shape; and use a variety of structural measures to reduce stress concentration and improve strength, to further ensure the quality and performance of the product.


The above is the content brought to you by the United States Cheng ceramics. Mei Cheng ceramics is a collection of R & D, production, sales in one of the electronic ceramics enterprises, start listed companies, is located in Hunan Province, Xinhua County, electronic ceramics industrial park, covers an area of 8W flat. Mainly engaged in: zirconia ceramics, alumina ceramics, talc ceramics and other non-oxide ceramics research and development and application.